Ditching-jack.



- r2 I E VNLABLE CO= 4 No. 784,890.- 4 i v PATE' TED MAR.14,1905 I H IR. RUB.

. DITGHING JACK.

APPLIGATION FILED IAN. 12/1905.

whtNEssEs I floss Rye 22,44 $2 M51 ATTORNEY INVENTORI UNITE-Ln fi ma'rnsPatented March 14,'1ecrs..

li ATLENT Grimes.

ROSS liUlil, OF ALLlAhUi'I-r OHM).

SPECIFICATION tori-11mg part of Letters Patent No. 78 3.399; dated March14;, 1905.

\ .icatien tiled January 12, 1995. Serial 1%. 240,8 t0.

this speciiicatiom and to the ninnerals of ref-" erence marked thereon,in-which- Figure 1 is a longitudinal section of the jack andlongitudinal section ofthc handle, showing handle folded in dottedlines. Fig. 2 is a section on line 2 .5, Fig. 1. Fig. 3 is a view of thejack sockethead and foot showing the cap removed.- hig. 4 is a detachedperspective view of the cap. Fig. 5 is a face view of the foot.

The present invention has relation to ditch; ing-jacks; and it consistsin the novel construction hereinafter described, and particuhnly pointedout in the claims.

Similar numerals of reference indicate corresponding parts in all theiigures of the drawings.

1n theacconnianyingdrawings, i represents the'jack-stem, which may beformed of any desired length and is provided with an enlargedscrevwthreaded portion 2, upon which screwthreaded portion is adjustablvattached thcjack socket stem or member 3. The jack-stem 1 is providedwith the foot 4. which foot is securely attached to the jack-stem bymeans of the rivet 5 or its equivalent. or member-3 is formed integraltherewith the head 6, which head is for the purpose of entering thesocket 7, formed in thefoot 8.

The socket stem or member 3 is provided with the flange 9, whichflange-is provided with the groove and the cross-slots 11. Around theflange 9 is located the yoke 12, to which yoke-is attached the flangedstem 13 and the flanged stem securelyclamped upon the flange 9 bysuitahlc nuts 14:, by which arrangement the stem 13 is h ld in lixedrelation with th socket stlan 3. W i ain the stem 13 is located the red"o iiting bar 5, which bar is provided with the shank 16 and aroundwhich shank is located the spring 17 which To the jack socket stemsprii'ig'is for the purpose of normally holding the reciprocating bar inengagement with thecross'slots H. To the outer end of the stem 13ampivotally attached the handle memhers 18, which handle members arepreferably formed integral with the handle propen 19. Between the handlemembers 18 and the hen-- dle 19 is-loeated' the link-like portion 20,which link-like portion receives the outer end of the pull-bar 21, whichpull-bar is provided with the eye or ring 22'. The pull-bar 21 ispivotally attached to the shank 16. It will be. understood that when thehandle 19 is moved around a center forming the longitudinal axis of thejack-shank 1 and thesocket member 3 5 said sochet member will be rotatedwhen the reciprocating bar 15 is engaged with'onc of the cross-slots 11,and thereby rotate the socket member 3-npon the screw-threads of i theshank 1, and when the socket member 3 is rotated in one dircctio it willmove the feet 4 and 8 away from each other or, in other words, willexpand the length'ofthe jack, and when the handle 19 is rotated in theopposite direction it will shorten the length of the jack by moving thefeet toward each other. i

It is well understood that in ditching-jacks it is diilticult to givethe handle a full revolution; but to overcome this difliculty therecip-' rocating bar 15 is provided and operated. by 30 the hand bymeans of the eye or ring 22. Thehandle after it has been moved as far asconven ient is released from opcrati vc contact with the socket member 3by disengaging the reciprocating bar from one of the cross-slots, 5;

after which the handle 9 can be given a backward movement and 'the bar15 engaged in a .-diii" rent cross-slot, after which aforward oroperative movement can be given {to the handle. f

For the purpose of moving the handle out of the way after the jackproper has been adjusted to hold the planks or other structure of theditch it is turned upon the pivotal points of the handle members 18, andin order theta 95 ivotal connection may he made between the pull-bar 21and the shank 18 said shank and pnd za a e 'i 'otally connected togetherat a point near and a little to one side of the pivotal point of thehandle proper, by which ar 9 main of'ashonjlder 24 and the bar15. How

rangernent the handle can be moved out of the. 5- F way Withoutdisconnecting any of the operativei a'rts. For. the purpose of providingproper con- 5 tact'fontheheadsi and 8 said heads are pro- ;Widedvvithcontact'teeth 23,- and for the purpose ofjf ornii ng a light structureand at the 'F sarhe time bringing a portion of the contact teeth-23'sorne distance away from the axis of the jack'shankan'd socket members 3the contactjendsiofgthe heads 4 and 8 may be of the m' of an ellipse, bywhich arrangement nieof-the hphtact-teeth are located a sufli- .cient.distance way from the axis to better. prevent anyajslippingof the heads..;1;fl501';the parpes of holding thehead 6 in the spcketq'ithefc'ap24lis; provided, which cap is heldby suitable clamping bolts.'The spring "{17 shouldoflconrse be confined at its ends by detaileddescription.

The stem @13 is 'provided ith the spaced flanges 1,3,- whicl spacedflanges are located pon bpbositeisid sfof the flange 9, by which"rangementthefstem 13iijs held against latera] displacenientf i d leHaving fully describedniy invention, what Lclaitn as new, dsi retosecure by Letters ever, this is-s'iniply mechanical and needs noheieolnbination hfv F BEST AVAlLABLE C93 jack members adjnstablyconnected together, said members provided with feet, and one of saidmembers provided with a-flange having an annular groove, cross-slotsintersecting the groove, a yoke located around the flange, a

- 2. In a ditching-jack, the combination of- .jack meinbers providedwith screw-threads,

heads secured to the members, one of the members provided with a notchedand grooved flange, a shank cqnnectedto the notched and grooved flange,a reciprocating bar adapted to engage the notches of the flange, ahandle piv'- otallyattached to the. shank, and means for disengaging thereciprocating blade from the purpose specified."-

In testimony that I claim th'et' above I have" hereuntoslibscribedniynanie-i presence 1 of two witnesses; g I

'. witnesses:

L. HART, H10; KonnLnR,

a notched flange, substantially as} and. for-the 55 noss' nns

